Brake Caliper Piston, FN 3, Removing and Installing

Brake Caliper Piston, FN 3, Removing and Installing

Special tools, testers and auxiliary items required





^ Removing wedge VAS 3409
^ Piston resetting tool

Removing





- Force piston out of brake caliper housing using compressed air.

Note:
^ Place a piece of wood in the recess to prevent damage to the piston.





- Remove seal using wedge 3409

Note:
^ Make sure when removing the surface of the cylinder is not damaged.

Installing

- The surface of the piston and seal must only be cleaned with methylated spirits and then dried.
- Apply thin coat of assembly paste G 052 150 A2 to piston and protective seal before installing.
- Insert oil seal in brake caliper housing.





- Position outer sealing lip on piston.





- Using Removing wedge VAS 3409, insert the inner sealing lip into the grove in the cylinder.

Note:
^ When doing this hold piston in front of caliper housing.





- Press piston into the brake caliper housing using piston resetting tool.

Note:
^ The protective seal outer sealing lip will then locate in the piston groove.